remcos | 6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19

General

Target

6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe
Size

1009KB
MD5

315e65c13807e7f205df9221d1281260
SHA1

bf3f7a5b38e44f012210f0947c8339784501408a
SHA256

6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19
SHA512

6cee8a2e91a9fd40cb47ba95d30dfc34d19a8a404ae76bc6af723b942349ed488c20068a5eecb471282dc0d022113c91e03100c968ad2e89e9e6fdcd57ed2adf
SSDEEP

24576:hG6Wnz1pzlKpMyLmtR/aYT5UbcqvLUsZdKaL7IEGJRTCg071KL:499KpMyLmtMOUVHZdt7cHTDwKL

Score

10^/10

remcos discovery persistence rat upx

Malware Config

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Blocklisted process makes network request 5 IoCs

flow	pid	Process
21	3328	powershell.exe
25	3328	powershell.exe
33	3328	powershell.exe
38	3328	powershell.exe
45	3328	powershell.exe

Loads dropped DLL 1 IoCs

pid	Process
2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Svaghedstegnet = "C:\\Users\\Admin\\AppData\\Roaming\\Encysting\\Unfulminant.exe"	powershell.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3328	powershell.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe
3328	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2208 set thread context of 3328	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	94

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3328-28-0x0000000000400000-0x00000000005E4000-memory.dmp	upx
behavioral2/memory/3328-33-0x0000000000400000-0x00000000005E4000-memory.dmp	upx

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ekskommunicere\Rachmaninoff.sto	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe
2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3328	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 1220	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	93
PID 2208 wrote to memory of 1220	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	93
PID 2208 wrote to memory of 1220	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	93
PID 2208 wrote to memory of 3328	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	94
PID 2208 wrote to memory of 3328	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	94
PID 2208 wrote to memory of 3328	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	94
PID 2208 wrote to memory of 3328	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	94
PID 2208 wrote to memory of 3328	2208	6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe	94

C:\Users\Admin\AppData\Local\Temp\6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe
"C:\Users\Admin\AppData\Local\Temp\6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Users\Admin\AppData\Local\Temp\6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe"
  2⤵
  PID:1220
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Users\Admin\AppData\Local\Temp\6ced83ce229096a2eee7a320351636a6031955969573465a59a2c99da2c84b19N.exe"
  2⤵
  - Blocklisted process makes network request
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsn9982.tmp\System.dll

Filesize
12KB

MD5
192639861e3dc2dc5c08bb8f8c7260d5

SHA1
58d30e460609e22fa0098bc27d928b689ef9af78

SHA256
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6

SHA512
6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

Download Submit
memory/2208-11-0x00000000770D1000-0x00000000771F1000-memory.dmp

Filesize
1.1MB

Download
memory/2208-12-0x0000000073F35000-0x0000000073F36000-memory.dmp

Filesize
4KB

Download
memory/2208-13-0x0000000073F30000-0x0000000073F37000-memory.dmp

Filesize
28KB

Download
memory/3328-14-0x00000000770D1000-0x00000000771F1000-memory.dmp

Filesize
1.1MB

Download
memory/3328-15-0x0000000077158000-0x0000000077159000-memory.dmp

Filesize
4KB

Download
memory/3328-16-0x00000000770D1000-0x00000000771F1000-memory.dmp

Filesize
1.1MB

Download
memory/3328-24-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-28-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-31-0x00000000770D1000-0x00000000771F1000-memory.dmp

Filesize
1.1MB

Download
memory/3328-32-0x000000000040F000-0x0000000000410000-memory.dmp

Filesize
4KB

Download
memory/3328-33-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-36-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-37-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-38-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-35-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-34-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-39-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-41-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-40-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-42-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-43-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-44-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-45-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-46-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-50-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-51-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-52-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-53-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-54-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3328-55-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads